In english

There are other variants of the UNIX operating system. A few of them would be: Berkeley System Distribution (BSD - also known as UNIX Berkeley), FreeBSD, SCO UNIX, SunOS / Solaris, NextStep, NCR, IBM/AIX, Apple Mac OS X, HP-UX.

• UNIX is well-established in the industrial sector, in research and in universities.
• The advent of Intel's 80386 chip allows UNIX to be ported to PCs (MS XENIX).
• First release of Linux in 1991.